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Get started in three steps

Connect to our secure WebSocket API and start receiving real-time orderbook data from 52+ active exchanges across 70+ supported platforms with SSL/TLS encryption. Plus access our Unified Transaction APIs for multi-exchange transaction processing.

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Step 1: Get your API key

Contact our support team to get your API key with access to:
  • 50GB monthly data limit
  • WebSocket-only connections
  • Real-time orderbook updates
  • 52+ active exchanges across 70+ supported platforms
Your API key will be in the format: demo_key_123
Track your data consumption in real-time:
curl "https://data.quantcite.com/api/v1/data-usage/YOUR_API_KEY"
Monitor usage regularly to avoid hitting the 50GB monthly limit.

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Step 2: Connect to WebSocket

Connect to our secure WebSocket endpoint:
wss://data.quantcite.com/api/v1/ws
Note: Authentication is now done via WebSocket message, not URL parameter for enhanced security.
After connecting, send an authentication message:
{
  "type": "authenticate",
  "api_key": "YOUR_API_KEY"
}
You’ll receive a welcome message with session ID and tier information.

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Step 3: Subscribe to data

Subscribe to real-time orderbook data for any trading pair:
{
  "type": "subscribe_aggregated",
  "symbol": "BTC/USDT",
  "exchanges": ["binance", "okx", "bybit"]
}
Or subscribe to all available exchanges:
{
  "type": "subscribe_aggregated", 
  "symbol": "BTC/USDT",
  "exchanges": "all"
}
Start receiving continuous orderbook updates:
{
  "type": "aggregated_orderbook_update",
  "symbol": "BTC/USDT",
  "data": {
    "bids": [...],
    "asks": [...],
    "market_stats": {
      "best_bid": 113393.9,
      "best_ask": 113400.0,
      "spread": 6.1
    }
  }
}

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Next steps

Now that you’re connected, explore these integration options:

Unified Transaction APIs

Process transactions from multiple exchanges in standardized format.

Python Client

Complete Python WebSocket client with async support.

JavaScript Client

Node.js WebSocket client for real-time data streaming.

WebSocket Messages

Learn about all available message types and responses.

Transaction Processing

Fetch and process cryptocurrency transactions from exchanges.

Rate Limits

Understand tier-based rate limiting and data usage.
Need help? Check our API Reference for complete documentation.